install elasticsearch on docker

• vi docker-compose.yml

To get Elasticsearch cluster and kibana up and running in Docker, you can use Docker Compose.

If you don’t want to expose port 9200 and instead use a reverse proxy, replace 9200:9200 with 127.0.0.1:9200:9200 in the docker-compose.yml file. Elasticsearch will then only be accessible from the host machine itself(www.elastic.co/guide/en/elasticsearch/reference/current/docker.html).

version: '3.5'

services:
  
  es:
    image: docker.elastic.co/elasticsearch/elasticsearch:7.10.2
    container_name: es
    environment:
      - discovery.type=single-node
      - bootstrap.memory_lock=true
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits:
      memlock:
        soft: -1
        hard: -1
    ports:
      - 9200:9200
    networks:
      - ekl
  kibana:
    image: docker.elastic.co/kibana/kibana:7.10.2
    container_name: kibana
    ports:
      - 5601:5601
    environment:
      ELASTICSEARCH_URL: http://es:9200
      ELASTICSEARCH_HOSTS: http://es:9200
    depends_on: 
      - es
    networks:
      - ekl

networks:
  ekl:
    driver: bridge

 

• docker-compose up -d

-d : Detached, opposite to -i -t in other words, it estabilished running the application on the foreground, unlike interactive mode -i -t. It executes the container without input and output. It doesnt receive user's input. 

 

• docker-compose logs --tail 100 -f

Displays log output from services.

Attaching to kibana, es
es        | {"type": "server", "timestamp": "2021-04-12T09:50:14,977Z", "level": "INFO", "component": "o.e.p.PluginsService", "cluster.name": "docker-cluster", "node.name": "cabe98f0ad02", "message": "loaded module [x-pack-data-streams]" }

...

--tail : number of lines to show from the end of the logs for each container.

-f : follow, follow log output

 

• curl -X GET "localhost:9200/_cat/nodes?v=true&pretty"

Submit a _cat/nodes request to see that the nodes are up and running.

_cat/nodes : Returns information about a cluster's nodes.

curl -X GET "localhost:9200/_cat/nodes?v=true&pretty"
ip         heap.percent ram.percent cpu load_1m load_5m load_15m node.role  master name
172.19.0.2           48          95   1    0.04    0.06     0.05 cdhilmrstw *      cabe98f0ad02

 

• docker-compose down

To stop the cluster. The data in the Docker volumes is preserved and loaded when you restart the cluster with docker-compose up.